If you can figure a way to use a smartphone to do all the work, and develop a USB plug in counter - either IR or RF, that might be a way to keep the price down. The Orion counter works great, and people paid before the advent of the personal transponder. You would see 10 or more Orion lap counters lined up at the big races during practice. Now that demand is lower, if you can keep the price point reasonable, you could probably tap the smaller market of bashers and guys who are practicing where scoring is not available at all times.